Incorrect annotation of delimiters, such as ‘\bigl\{...\bigr|...\bigr\}’ instead of ‘\bigl\{...\bigg|...\bigr\}’

Empty bases for subscripts and superscripts, such as ‘{}^{...}, {}_{...}’ instead of ‘{\csnameHCode\endcsname{}}^{...}, {\csname HCode\endcsname{}}_{...}’.

Missing grouping for bases of subscripts and superscripts, such as ‘10^6’ instead of ‘{10}^6’. (Some fixing of the
problem can be requested through a ‘-cxhtmml’ command line option for t4ht.c. For instance, ‘mzlatex file "" """-cxhtmml"’.)

Missing grouping for subscripts and suprscripts, such as ‘A_\mathit{...}’ instead of ‘A_{\mathit{...}}’. (LaTeX
allows indirect access to the content of the operands; TeX4ht requires direct access.)

Use of the operators ‘^’ and ‘_’, instead of ‘\sb’ and ‘\sp’, outside the presence of TeX4ht. (TeX4ht becomes active
only at the ‘\begin{document}’ command. The ‘early_’ and ‘early^’ options extend this awareness to the
preambles of the source latex documents.)